Rain That Swallowed the Ground

Three hundred years have passed since the dragons and serpents vanished. Worried about humankind, the Heavenly Emperor commands the last dragon, Yeonmok, who has remained in isolation since the passing of his cherished disciple, to search for the missing dragons and serpents. When Yeonmok descends into the human realm, he meets a young serpent named Doya, whose true identity remains a mystery.